11-20-2013 10:09 AM - edited 03-04-2019 09:37 PM
Hello,
I need a little clarification / assistance please. I have a cable modem connection that is 50mb down and 3mb up. The most I ever do in the download direction is around 8 to 10 mb. It's the upload that gets me sometimes when it spikes to around 2.5mbps up. I need to make sure my voip traffic ALWAYS gets sent on the wire first, regardless if there is congestion or not. Would the policy below work? If not, how should I tweak it.
Thank you,
class-map match-any QOS_REAL-TIME_VOIP
match access-group name VOIP_Traffic
ip access-list extended VOIP_Traffic
permit ip any any eq x.x.x.x
permit ip any any eq x.x.x.x
policy-map VoIP
class QOS_REAL-TIME_VOIP
priority 784
class class-default
shape average 48000000
bandwidth 50000000
Thank you,
11-20-2013 10:13 AM
Your policy should help outbound traffic. You're guaranteeing 784k and then policing that traffic at 784k with the priority command. If you don't have anything else in the class default queue, voice can take it all. It only polices when there is other traffic in other queues waiting to be sent.
Everything else will match your default class. You need to configure this on the wan interface in the outbound direction:
int
service-policy output VoIP
HTH,
John
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11-20-2013 12:43 PM
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Posting
No, what you have won't work.
You would want something like:
policy-map shape4upstream
class class-default
shape average 2550000 !I'm shaping 15% under 3 Mbps to allow for L2 overhead
service-policy VoIP
policy-map VoIP
class QOS_REAL-TIME_VOIP
priority 784
class class-default
fair-queue
[edit]
BTW, you would use the shape4upstream policy as the egress policy on your cable modem facing port
11-20-2013 12:58 PM
Joseph,
I have to ask...how is the policy map different from the original posted?
It still has a priority queue, but now it's embedded in another policy map. I guess the question is how does IOS treat the original map (which I thought should work fine) versus the one that you posted where it's embedded aside from shaping everything to the CIR?
*** Wait...did I just answer my own question? ***
HTH,
John
*** Please rate all useful posts ***
11-20-2013 02:24 PM
Good catch. My shaping was all wroing. It's outbudnd based is 3mb up! I originally shaped it for the 50mb down. Right?
The top policy is shaping the overal "tunnel" for 3mbs/2.5mb. Correct?
11-20-2013 05:00 PM
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Correct and yes, although latter not for a "tunnel".
11-20-2013 05:03 PM
Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
*** Wait...did I just answer my own question? ***
You did
Additionally, the original policy's LLQ would never engage assuming the physical interface was greater than 48 Mbps, which would be a bit hard on a 3 Mbps uplink cap.
11-20-2013 06:14 PM
Thanks Joseph....I completely missed the shaped rate. Does it count that I'm on meds for a sinus issue? Lol...
HTH,
John
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